Help...Persistant Ich

Hi,

I'm new to this group but looking for some help. We seem to have a very
persistant case of Ich in our tank.

Established (3years) 130 litre tank, water conditions are all as they should
be, ammonia 0, nitrite 0 and nitrate around 10. Put in 9 new neons recently
and we are assuming that's where the problem came from (unfortunatly we
don't have a quarantine tank).

Have treated with Esha Exit ( I think it's a malachite green based formula
but no ingredients on packaging) as advised by the LFS, followed the
instructions and the problem appears to just get worse. Has been going on
for about 10 days now and showing absolutely no signs of improvement, just
gets worse every day.

I've read up on the other posts on here and have now switched off the lights
and raised the temp, and will try adding salt. My biggest concer are my
breeding pair of bristlenose catfish who have been in the tank for about 3
years now and are both showing signs of this problem.

Any advice/medication suggestions that anyone can think of would be very
gratefully received

Getting quite desparate now :-(

Clara